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| Farm-in |
Transfer of part of an oil or gas interest in consideration for an agreement by transferee(s) to meet certain expenditure that would otherwise have to be undertaken by licensee(s). |
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| Geophysics |
Branch of science that applies physical principles to study of planet earth. |
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| Gravity surveys |
Measure density variations in local rock masses. Surveys are based on use of a gravimeter down bore holes. |
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| Horizontal Drilling |
Technique for cutting a bore hole in geological strata in a horizontal, rather than normal vertical, direction. (see also Horizontal well) |
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| Kick |
Back pressure in well from invading oil / gas / water. |
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| Killing a well |
Filling bore with drilling mud of suitable density to stop flow of oil / gas. |
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| Liner |
Small diameter casing extending into producing layer from just inside bottom of final string of casing cemented in a well. |
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| Modular formation dynamics tester |
Measures fluid pressures and collects small samples in a well. |
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| Plugging |
Process whereby a well that is no longer needed is filled with concrete and abandoned. (see PA). |
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| Reservoir |
Subsurface, porous, permeable rock formation in which hydrocarbons are present. |
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| Rotary Drilling |
Being coupled to rotating table on derrick floor rotates drill-string. |
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| Rotary Table / Drilling Table |
Turning device on derrick floor in which drill-string is held and rotated. |
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| Round trip |
Complete process of pulling out and running in drill-string. |
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